Actor Park Bo-gum, 33, has revealed the disciplined diet and exercise routine behind his noticeably broader, more muscular physique.
Appearing on singer Sean’s YouTube channel, Park described his current daily regimen: "These days, I eat four meals a day. Out of those four, one meal always includes carbohydrates—I eat brown rice—and I eat two chicken breasts with all four meals." He added, "Once I started eating clean like that, everything changed. The way my body looks changed, and my facial lines changed. Training alongside that diet allowed me to see real improvements."
Park explained that his standard workout routine consists of one hour of weight training followed by 10 minutes of cardio. While currently in the final stages of filming the movie Kal: Godumakhan’s Sword, he uses a cordless jump rope on set in place of traditional cardio equipment.
Park’s physical transformation has recently drawn significant attention at brand events and photoshoots. Contrasting his boyish facial features with a broader chest and thicker arms, online fans reacted enthusiastically, commenting, "His face is a boy, but his body is a real man," and "After only seeing skinny celebrities, Park Bo-gum looks so cool."
8 Chicken Breasts a Day: Fueling Muscle Growth
Bulking up is not simply about gaining weight; it is a strategic process designed to increase muscle mass through adequate nutrition and progressive resistance training. Park’s approach aligns with lean bulking—boosting muscle tissue while minimizing body fat gain.
To achieve this, Park consumes two chicken breasts per meal across four meals, totaling eight chicken breasts daily. Chicken breast is a staple lean protein source that provides essential amino acids required for tissue repair. Because weightlifting creates microscopic tears in muscle fibers, providing a steady supply of protein throughout the day is critical for recovery and hypertrophy.
The International Society of Sports Nutrition (ISSN) recommends a daily protein intake of 1.4 to 2.0 grams per kilogram of body weight for individuals engaged in regular exercise. For an adult weighing 70 kg aiming to build muscle, this translates to roughly 100 to 140 grams of protein per day. However, protein alone is insufficient for optimal growth. Adequate carbohydrates and healthy fats are necessary to sustain workout performance and provide the energy required for muscle synthesis.
Replenishing Energy with Brown Rice and Clean Foods
Park ensures that one of his daily meals includes brown rice to replenish carbohydrates. Carbohydrates serve as the body's primary fuel source during high-intensity weight training by restoring glycogen—the stored glucose in muscle tissue used during strenuous activity. Brown rice offers more dietary fiber and micronutrients than white rice, helping maintain satiety and steady blood sugar levels. During a bulking phase, caloric intake should be adjusted relative to workout volume rather than consuming excessive unmeasured calories.
The shift Park observed—where clean eating refined his body composition and facial lines—illustrates the benefits of prioritizing whole foods over processed items and added sugars during a bulking cycle.
Structuring a Routine for Muscle Growth
To build a solid frame like Park’s, weight training should serve as the primary focus, with cardio used supplementally for cardiovascular health and body-fat management. Driving muscle growth requires the principle of progressive overload—gradually increasing weight, repetitions, or training intensity over time.
A standard five-day resistance training split can be structured as follows:
Day 1 (Chest & Triceps): Bench press (4 sets of 8–12 reps), incline dumbbell press (3 sets of 10 reps), cable flyes (3 sets of 12–15 reps), dips (3 sets), and triceps extensions (3 sets).
Day 2 (Back & Biceps): Pull-ups or lat pulldowns (4 sets), barbell rows (4 sets), seated cable rows (3 sets), deadlifts (3 sets), and biceps curls (3 sets).
Day 3 (Lower Body): Barbell squats (4 sets), leg presses (3 sets), lunges (3 sets), leg curls (3 sets), and calf raises (3 sets).
Day 4 (Shoulders & Core): Overhead shoulder press (4 sets), side lateral raises (4 sets), rear delt flyes (3 sets), and core exercises.
Day 5 (Full Body & Weak Points): Compound movements or targeted accessory work to address specific lagging areas.
Because excessive high-intensity cardio can interfere with muscle recovery and deplete energy reserves during a bulking phase, moderate-intensity cardio—such as light jogging, incline treadmill walking, cycling, or stair climbing—is best limited to two or three sessions per week, lasting 20 to 40 minutes per session.
